LAKE MICHIGAN — It was 3:30 a.m., and Jeff Voss was tired. Voss, a tool and die shop owner when he's not diving on shipwrecks, had been at the wheel since midnight, kept awake by Red Bull and the monotonous duty of keeping the boat on course while simultaneously monitoring the sonar. Somewhere below, a phantom lay waiting. Voss and his fellow wreck sleuths had been patiently combing a 10-square-mile grid of Lake Michigan off Muskegon for the past three days in a modified 25-foot Bayliner; "mowing the lawn" with side-scan sonar in search of a lost propeller steamer that...
